20206867 has 2 divisors, whose sum is σ = 20206868. Its totient is φ = 20206866.

The previous prime is 20206853. The next prime is 20206889. The reversal of 20206867 is 76860202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20206867 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20206807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10103433 + 10103434.

It is an arithmetic number, because the mean of its divisors is an integer number (10103434).

Almost surely, 2^20206867 is an apocalyptic number.

20206867 is a deficient number, since it is larger than the sum of its proper divisors (1).

20206867 is an equidigital number, since it uses as much as digits as its factorization.

20206867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 20206867 is about 4495.2048896574. The cubic root of 20206867 is about 272.3744257707.

The spelling of 20206867 in words is "twenty million, two hundred six thousand, eight hundred sixty-seven".